All of the following conditions exert dynamic loading on a crane EXCEPT:

Dynamic loading refers to forces that change due to movement and time, as opposed to static loading, which remains constant. In the context of crane operation, several factors can contribute to dynamic loading, such as swinging loads due to movement, adverse operating conditions like wind or uneven terrain, and moving the crane itself while it is traveling.

The condition that does not contribute to dynamic loading is maintaining a static boom angle. When the boom angle is static, it means there is no movement or change occurring within the system; hence, the forces acting on the crane remain constant. This contrasts with swinging loads or traveling conditions that actively introduce variability in both the forces applied and the stresses placed on the crane components.

Understanding the difference between dynamic and static loading is essential for safe and effective crane operation. Static conditions are predictable and do not add additional stress in the same way that dynamic conditions do, making the static boom angle the exception in this instance.